source/renderbuffer.cpp

   1 #include <msp/gl/extensions/arb_direct_state_access.h>
   2 #include <msp/gl/extensions/ext_framebuffer_multisample.h>
   3 #include <msp/gl/extensions/ext_framebuffer_object.h>
   4 #include "misc.h"
   5 #include "renderbuffer.h"
   6
   7 using namespace std;
   8
   9 namespace Msp {
  10 namespace GL {
  11
  12 Renderbuffer::Renderbuffer()
  13 {
  14         static Require _req(EXT_framebuffer_object);
  15
  16         if(ARB_direct_state_access)
  17                 glCreateRenderbuffers(1, &id);
  18         else
  19                 glGenRenderbuffers(1, &id);
  20 }
  21
  22 Renderbuffer::~Renderbuffer()
  23 {
  24         glDeleteRenderbuffers(1, &id);
  25 }
  26
  27 void Renderbuffer::storage(PixelFormat fmt, unsigned wd, unsigned ht)
  28 {
  29         require_pixelformat(fmt);
  30         width = wd;
  31         height = ht;
  32         if(ARB_direct_state_access)
  33                 glNamedRenderbufferStorage(id, fmt, width, height);
  34         else
  35         {
  36                 BindRestore _bind(this);
  37                 glRenderbufferStorage(GL_RENDERBUFFER, fmt, width, height);
  38         }
  39 }
  40
  41 unsigned Renderbuffer::get_max_samples()
  42 {
  43         static unsigned max_samples = (EXT_framebuffer_multisample ? get_i(GL_MAX_SAMPLES) : 0);
  44         return max_samples;
  45 }
  46
  47 void Renderbuffer::storage_multisample(unsigned samples, PixelFormat fmt, unsigned wd, unsigned ht)
  48 {
  49         if(!samples)
  50                 return storage(fmt, wd, ht);
  51
  52         static Require _req(EXT_framebuffer_multisample);
  53         if(samples>get_max_samples())
  54                 throw out_of_range("Renderbuffer::storage_multisample");
  55
  56         require_pixelformat(fmt);
  57
  58         width = wd;
  59         height = ht;
  60         if(ARB_direct_state_access)
  61                 glNamedRenderbufferStorageMultisample(id, samples, fmt, width, height);
  62         else
  63         {
  64                 BindRestore _bind(this);
  65                 glRenderbufferStorageMultisample(GL_RENDERBUFFER, samples, fmt, width, height);
  66         }
  67 }
  68
  69 void Renderbuffer::bind() const
  70 {
  71         if(set_current(this))
  72                 glBindRenderbuffer(GL_RENDERBUFFER, id);
  73 }
  74
  75 void Renderbuffer::unbind()
  76 {
  77         if(set_current(0))
  78                 glBindRenderbuffer(GL_RENDERBUFFER, 0);
  79 }
  80
  81 } // namespace GL
  82 } // namespace Msp